The yellow-tailed blue devil has a bright blue body and a charming yellow color on its tail and tail fins. This fish is easy to recognize, as its name suggests.
The Diving Fish Book calls them neon snappers, which I personally don't quite approve of.
Taken on December 16, 2018, off the coast of the small town of Dumaguetauin, Philippines.
Disclaimer: Copyrighted photographs, without permission, are prohibited from infringing.